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[Launchpad Bug Tracker <1669924@xxxxxxxxxxxxxxxxxx>]

[Expired for OpenStack Compute (nova) because there has been no activity
for 60 days.]

** Changed in: nova
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1669924

Title:
  InstanceUpdateConflict: Conflict updating instance Expected:
  {'vm_state': ['building', None]}. Actual: {'vm_state': u'error'}

Status in OpenStack Compute (nova):
  Expired

Bug description:
  VM creation got stuck at nova-cells. I can see following error in nova-cells.
  Because of this issue, nova scheduler not getting any Compute nodes to schedule the VM.
  Please le me know if you need more infos.
  I am using devstack master (master nova)

  -------------------

  Log form nova-cells
  --------------------------

  2017-03-03 22:43:08.723 ERROR nova.cells.messaging [req-719c3e5b-8a74-446e-88ea-cd21a4c038ed nfv nfv_user] Error processing message locally
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging Traceback (most recent call last):
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging   File "/opt/stack/nova/nova/cells/messaging.py", line 188, in _process_locally
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging     resp_value = self.msg_runner._process_message_locally(self)
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging   File "/opt/stack/nova/nova/cells/messaging.py", line 1275, in _process_message_locally
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging     return fn(message, **message.method_kwargs)
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging   File "/opt/stack/nova/nova/cells/messaging.py", line 1024, in instance_update_at_top
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging     expected_task_state=expected_task_state)
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging   File "/usr/local/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 226, in wrappe
  r
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging     return fn(self, *args, **kwargs)
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging   File "/opt/stack/nova/nova/objects/instance.py", line 777, in save
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging     columns_to_join=_expected_cols(expected_attrs))
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging   File "/opt/stack/nova/nova/db/api.py", line 840, in instance_update_and_get_original
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging     expected=expected)
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging   File "/opt/stack/nova/nova/db/sqlalchemy/api.py", line 180, in wrapper
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging     return f(*args, **kwargs)
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging   File "/usr/local/lib/python2.7/dist-packages/oslo_db/api.py", line 151, in wrapper
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging     ectxt.value = e.inner_exc
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 220, in __exit__
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging     self.force_reraise()
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging   File "/usr/local/lib/python2.7/dist-packages/oslo_utils/excutils.py", line 196, in force_reraise
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging     six.reraise(self.type_, self.value, self.tb)
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging   File "/usr/local/lib/python2.7/dist-packages/oslo_db/api.py", line 139, in wrapper
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging     return f(*args, **kwargs)
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging   File "/opt/stack/nova/nova/db/sqlalchemy/api.py", line 251, in wrapped
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging     return f(context, *args, **kwargs)
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging   File "/opt/stack/nova/nova/db/sqlalchemy/api.py", line 2710, in instance_update_and_get_original
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging     context, instance_uuid, values, expected, original=instance_ref))
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging   File "/opt/stack/nova/nova/db/sqlalchemy/api.py", line 2846, in _instance_update
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging     raise exc(**exc_props)
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging InstanceUpdateConflict: Conflict updating instance 4d3dae25-906a-4e38-9075-1417c6fa7ad9. Expected:
   {'vm_state': ['building', None]}. Actual: {'vm_state': u'error'}
  2017-03-03 22:43:08.723 TRACE nova.cells.messaging

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